191246042719 has 2 divisors, whose sum is σ = 191246042720. Its totient is φ = 191246042718.

The previous prime is 191246042717. The next prime is 191246042747. The reversal of 191246042719 is 917240642191.

191246042719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191246042719 - 2¹ = 191246042717 is a prime.

It is a super-2 number, since 2×191246042719² (a number of 23 digits) contains 22 as substring.

Together with 191246042717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191246042717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95623021359 + 95623021360.

It is an arithmetic number, because the mean of its divisors is an integer number (95623021360).

Almost surely, 2^191246042719 is an apocalyptic number.

191246042719 is a deficient number, since it is larger than the sum of its proper divisors (1).

191246042719 is an equidigital number, since it uses as much as digits as its factorization.

191246042719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 191246042719 in words is "one hundred ninety-one billion, two hundred forty-six million, forty-two thousand, seven hundred nineteen".